src/main/drivers/display_font_metadata.h

   1 #pragma once
   2
   3 #include <stdbool.h>
   4 #include <stdint.h>
   5
   6 typedef struct osdCharacter_s osdCharacter_t;
   7
   8 typedef struct displayFontMetadata_s {
   9     uint8_t version;
  10     uint16_t charCount;
  11 } displayFontMetadata_t;
  12
  13 // 'I', 'N', 'A', 'V', 1
  14 #define FONT_CHR_IS_METADATA(chr) ((chr)->data[0] == 'I' && \
  15     (chr)->data[1] == 'N' && \
  16     (chr)->data[2] == 'A' && \
  17     (chr)->data[3] == 'V' && \
  18     (chr)->data[4] == 1)
  19
  20 #define FONT_METADATA_CHR_INDEX 255
  21 // Used for runtime detection of display drivers that might
  22 // support 256 or 512 characters.
  23 #define FONT_METADATA_CHR_INDEX_2ND_PAGE 256
  24
  25 bool displayFontMetadataUpdateFromCharacter(displayFontMetadata_t *metadata, const osdCharacter_t *chr);